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Home >> GMC >> 2001 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1015 (Engine Mechanical - 6.6L (Lb7) (Repair Instructions 4 Of 4)) >> Repair Instructions (Off-Vehicle - Part 4) >> Fuel Injection Control Module Harness Assembly Installation

Fuel Injection Control Module Harness Assembly Installation

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the main engine harness connector bracket.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the main engine harness connector bracket bolts.

    Tighten:  Tighten the bracket bolts to 21 N.m (15 lb ft).

    3. Fig 1: View Of Main Engine Harness Connector Bracket
    GM660434Courtesy of GENERAL MOTORS CORP.
  3. Install the fuel injection control module harness assembly.
    4. Fig 2: View Of Fuel Injection Control Module Harness Assembly
    GM755210Courtesy of GENERAL MOTORS CORP.
  4. Connect the 3 fuel injector control module harness to glow plug controller connectors.
  5. Connect the fuel temperature sensor connector.
    6. Fig 3: View Of Fuel Temperature Sensor Connector
    GM755205Courtesy of GENERAL MOTORS CORP.
  6. Connect the barometric pressure sensor connector.
  7. Connect the fuel injection control module harness to the oil level sensor harness connector.
    8. Fig 4: View Of Fuel Injection Control Module Harness
    GM755200Courtesy of GENERAL MOTORS CORP.
  8. Connect the fuel rail pressure regulator valve connector.
  9. Connect the fuel rail pressure sensor.
  10. Connect the fuel filter assembly connectors.
  11. Install a new O-ring to the water outlet and lubricate with engine coolant.
  12. Install the water outlet.
  13. Install the water outlet bolts.

    Tighten:  Tighten the water outlet bolts to 24 N.m (17 lb ft).

    14. Fig 5: View Of Water Outlet
    GM798877Courtesy of GENERAL MOTORS CORP.
  14. Install the turbocharger coolant inlet hose to the turbocharger.
    15. Fig 6: View Of Turbocharger Coolant Inlet Hose
    GM761227Courtesy of GENERAL MOTORS CORP.
  15. Install the main engine harness connectors.
  16. Install the main engine harness connector hold down bolts (1, 2).

    Tighten:  Tighten the main engine harness connector hold down bolts to 10 N.m (89 lb in).

    17. Fig 7: View Of Engine-To-Chassis Harness Connector & Bracket Bolts
    GM674680Courtesy of GENERAL MOTORS CORP.
  17. Install the two engine block ground bolts to the right front side of the engine.

    Tighten:  Tighten the engine block ground bolts to 34 N.m (25 lb ft).

    18. Fig 8: View Of Engine Block Ground Bolts (Right Side Of Engine)
    GM761235Courtesy of GENERAL MOTORS CORP.
  18. Connect the crankshaft position sensor connector.
    19. Fig 9: View Of Crankshaft Position Sensor Connector
    GM755194Courtesy of GENERAL MOTORS CORP.
  19. Connect the engine coolant temperature sensor connector.
    20. Fig 10: View Of Engine Coolant Temperature Sensor Connector
    GM755191Courtesy of GENERAL MOTORS CORP.
  20. Connect the fuel injection control module connectors.
  21. Connect the turbocharger boost sensor connector.
    22. Fig 11: View Of Turbocharger Boost Sensor Connector
    GM755187Courtesy of GENERAL MOTORS CORP.
  22. Connect the four injector harness connectors.
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